Right, there were no street lights where I grew up because street lights cost money and the people where I lived were rich partly because they paid few taxes, so no money for street lights. I happened to move to a city when it wasn't yet concerned about the environmental impact or cost, so I went from "Of course the main road doesn't have lights, what are we made of money?" to "Of course jogging tracks in the city parks have 24/7 street lighting. what if you wanted to go jogging at midnight, you can't jog in the dark!". Today those tracks don't have lighting 'cos there's no money and the wildlife hates it but thirty years ago, sure.

However some back roads aren't even B roads, the classification keeps going through C and D but it's local numbering, the numbers are just for local maintenance crews - so a C-1234 could be duplicated a few miles away in another local government territory and that would be confusing for drivers so they won't write C-1234 on a sign, they'll just say what's in that direction or maybe a local name for the road.